Serve script bundle from cloud proxy image for air gapped installs #2743

Job	Run time
env-protect-setup	6s
authorize	3s
get-dev-image / get-image	6s
clang-tidy	6m 26s
generate-matrix	23m 1s
code-coverage	0s
build-and-test (Clang opt + UI, nokvm, --config=clang --compilation_mode=opt, bazel_buildables_cl...	14m 6s
build-and-test-status	2s
	43m 50s

Provide feedback